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(11)

EP 3 475 544 A1

(12)

(43) Date of publication: 01.05.2019 Bulletin 2019/18 (21) Application number: 16907512.4 (22) Date of filing: 28.06.2016

(51) International Patent Classification (IPC):  F02B 75/02(2006.01) F02B 33/02(2006.01) F02B 37/00(2006.01) F02B 1/12(2006.01) (86) International application number: PCT/US2016/039853 (87) International publication number: WO 2018/004543 (04.01.2018 Gazette 2018/01)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (71) Applicant: DeltaHawk Engines, Inc. Racine, WI 53404 (US)	(72) Inventors: DOERS, Douglas A. Franklin, Wisconsin 53132 (US) GRECO, Robert A. Racine, Wisconsin 53405 (US) OLESEN, Paul Franklin, Wisconsin 53132 (US) WEBB, Dennis Raymond Franksville, Wisconsin 53126 (US) (74) Representative: Barker Brettell LLP  100 Hagley Road Edgbaston Birmingham B16 8QQ Birmingham B16 8QQ (GB)